Quote:
Originally Posted by dv657172
Just pulled breathers off with them still connected to the header extension pipes, at idle of approximately 1,000 rpm...
DS - has suction, not sure how much it should have or how you would measure it but it does have some
PS - air is actually blowing out of the breather
Check valve is not working....correct?
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Sounds like it, that is suppose to be a one way valve. With the old Hedman's I could have the breather stuck to my hands at a 90 degree angle at idle. My current Doug's are not as efficient but they still do the job. I can see if I have a spare check valve if you'd like.
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 Johnny US Army Retired
1978 T/A 463 Pontiac, KRE 74cc 292CFM D-ports, Lunati VooDoo, V-max lifters, TKII, ATM 850 E85 carb, TCI TH-350 race tranny, 3600 converter 3.73 12 bolt 11.63@116.68mph
1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3.42 30 spline Eaton posi street car.
1980 Formula 350 Pontiac back burner project
1972 LeMans 350 Pontiac
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